Hot melting device

Abstract

The utility model belongs to the technical field of hot melters, and particularly relates to a hot melter which comprises a grip and a heating block, a heat insulation device is arranged between the grip and the heating block and detachably connected with the grip and the heating block respectively, a control circuit for controlling the heating block is arranged on the grip, a first heat insulation gap is formed between the heating block and the heat insulation device, and a second heat insulation gap is formed between the heating block and the heat insulation device. The heat insulation device comprises a heat insulation sheet, the heat insulation sheet is arranged on the side, away from the heating block, of the first heat insulation gap, and a temperature measuring device is arranged on the side, away from the heating block, of the heat insulation sheet, can measure the temperature of the side, away from the heating block, of the heat insulation sheet and is electrically connected with the control circuit; and when the temperature measuring device detects that the temperature of one side, far away from the heating block, of the heat resisting sheet exceeds a set value, the control circuit controls the heating plate to stop heating, and the hot melting device is low in production cost and long in service life.

Description

Technical Field

[0001] This utility model belongs to the field of hot melt equipment technology, and specifically relates to a hot melt equipment. Background Technology

[0002] A hot melt machine is a professional welding tool used to heat and melt thermoplastic pipes and molds for connection. The working principle of a hot melt machine is mainly to transfer heat to the welding surfaces of thermoplastic pipes and molds through electrothermal methods, causing the surfaces to melt, and then the two molten surfaces are fused, solidified, and joined together.

[0003] When the heating block of the hot melt machine is continuously powered, the temperature of the heating block will continue to rise. Therefore, a temperature measuring structure needs to be added to the hot melt machine during use to control the maximum temperature of the heating block. For example, the hot melt machine disclosed in Chinese Utility Model Patent CN202323666642.9 includes a housing, a heat dissipation assembly connected to the housing, a heating assembly connected to the heat dissipation assembly, a temperature measuring assembly disposed in the heating assembly, and a circuit board electrically connected to the temperature measuring assembly. The circuit board is placed in the housing. The heating assembly includes a heating tube, a heat-conducting plate covering the heating tube, and a heating head connected to the heat-conducting plate. The characteristic is that the heat-conducting plate has a detection hole for accommodating the temperature measuring assembly. The temperature measuring assembly includes a thermocouple for detecting temperature and an insulating tube fixed to the detection hole. The thermocouple includes a wire portion installed in the insulating tube and a detection portion connected to the front end of the wire portion. The distance between the detection portion and the bottom surface of the detection hole is 0-10mm.

[0004] In the above structure, since the detection part is directly inserted into the detection hole, the required detection temperature is relatively high. As the maximum detection temperature of the temperature measuring device is higher, the price is also higher, resulting in a higher production cost of the hot melt. Furthermore, during use, the detection part may accidentally come into contact with the bottom or side of the detection hole, which may damage the temperature measuring device and affect the service life of the hot melt. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of this utility model is to provide a hot melter with low production cost and long service life.

[0006] The purpose of this utility model is achieved as follows:

[0007] A hot melt machine includes a handle and a heating block, with a heat insulation device disposed between the handle and the heating block. The heat insulation device is detachably connected to both the handle and the heating block. A control circuit for controlling the heating block is disposed on the handle. A first heat insulation gap is provided between the heating block and the heat insulation device. The heat insulation device includes a heat insulation sheet disposed on the side of the first heat insulation gap away from the heating block. A temperature measuring device is disposed on the side of the heat insulation sheet away from the heating block, and the temperature measuring device can measure the temperature on the side of the heat insulation sheet away from the heating block. The temperature measuring device is electrically connected to the control circuit.

[0008] When the temperature measuring device detects that the temperature on the side of the heat insulation sheet away from the heating block exceeds the set value, the control circuit controls the heating plate to stop heating.

[0009] The present invention is further configured such that the temperature measuring device is connected in series with the control circuit, and the overheating and damage of the temperature measuring device can cause the control circuit to be disconnected, thereby stopping the heating plate from heating.

[0010] The present invention is further configured such that: the heating block includes a heating block body, the heating block body extends toward the heat insulation sheet to form a plurality of supporting protrusions, and fasteners connect the heating block to the heat insulation sheet and make the supporting protrusions press against the heat insulation sheet, thereby forming the first heat insulation gap between the heating block body and the heat insulation sheet.

[0011] The present invention is further configured such that: the heat insulation device includes a heat insulation seat, the heat insulation seat is disposed on the side of the heat insulation sheet away from the heating block, and the heat insulation seat is provided with an installation cavity, and the temperature measuring device is disposed in the installation cavity.

[0012] The present invention is further configured such that: a vent hole is provided on the side wall of the heat insulation seat, and a baffle is provided on the heat insulation seat. The baffle is located on one side of the vent hole and can block the vent hole, thereby forming a curved airflow channel by combining the vent hole and the baffle.

[0013] The present invention is further configured such that: a slot is provided on the heat insulation seat, a baffle is slidably disposed in the slot, and the heat insulation plate abuts against the baffle and fixes the baffle on the heat insulation seat; a plurality of vent holes are provided at intervals on the heat insulation seat, and a blocking part corresponding to the vent holes is provided at intervals on the baffle, and a vent groove is formed between the blocking parts.

[0014] The present invention is further configured such that: the heat insulation device also includes a connecting seat detachably connected to the handle, the handle includes a left shell and a right shell detachably connected, the side of the connecting seat is provided with a snap-fit ​​protrusion, and both the left shell and the right shell are provided with C-shaped slots, and fasteners fix the left shell and the right shell relative to each other, so that the snap-fit ​​protrusion and the C-shaped slots are in cooperation.

[0015] The present invention is further configured such that: the connecting seat is provided with a plurality of positioning protrusions, and the heat insulation seat is provided with positioning grooves adapted to the positioning protrusions; the positioning protrusions and positioning grooves cooperate to position and install the connecting seat and the heat insulation seat, and to form a second heat insulation gap between the connecting seat and the heat insulation seat.

[0016] The advantages of this utility model compared to the prior art are:

[0017] 1. In this utility model, since the heat insulation sheet is set on the side of the first heat insulation gap away from the heating block, and the temperature measuring device detects the temperature of the side of the heat insulation sheet away from the heating block, this temperature will be much lower than the actual temperature of the heating block, thus avoiding overheating and damage to the temperature measuring device. Manufacturers can use a detection device with a lower maximum measurement temperature, thereby reducing the production cost of the hot melt.

[0018] 2. In this utility model, since the temperature measuring device is connected in series with the control circuit, the heating plate will stop heating when the temperature measuring device overheats and is damaged. This prevents the heating block from overheating and damaging other parts of the heat melter. Users can continue to use the heat melter by replacing the temperature measuring device, which helps reduce the maintenance cost of the heat melter and facilitates its continued use. The support protrusion helps to limit the width of the first heat insulation gap, avoiding errors in the width of the first heat insulation gap during assembly and production that could affect the detection results of the temperature measuring device. This also helps the control circuit to control the maximum heating temperature of the heating block.

[0019] 3. The heat insulation seat in this utility model can reduce the temperature of the handle during use, avoid damage to the control circuit, and facilitate user use. The installation cavity can prevent other items from contacting the temperature measuring device during use, prevent the temperature measuring device from becoming loose or damaged, reduce the error of the temperature measuring device's detection results, and extend the service life of the heat melter.

[0020] 4. The vent holes in this utility model can reduce the temperature in the mounting cavity, preventing overheating of the air in the mounting cavity from damaging the handle or control circuit. The baffle can prevent foreign objects from entering the mounting cavity, preventing them from damaging the temperature measuring device or control circuit, or from burning in the mounting cavity, thus extending the service life of the hot melt. The slot facilitates the positioning and installation of the baffle, while the shielding part corresponding to the vent holes prevents foreign objects from directly entering the mounting cavity. The vent groove facilitates the air circulation in the mounting cavity.

[0021] 5. The connecting seat in this utility model facilitates a stable connection between the heat insulation device and the handle. During use, different parts of the heat insulation device can be made of different materials, thus enabling the heat insulation device to achieve a good heat insulation effect, facilitating production, and extending the service life of the hot melt machine. The snap-fit ​​protrusion and C-shaped slot facilitate a stable connection between the heat insulation device and the handle, preventing accidental detachment of the heat insulation device and the handle during use. The positioning protrusion and positioning groove facilitate quick positioning and installation of the connecting seat and the heat insulation seat. The second heat insulation gap helps reduce the temperature of the connecting seat and the handle during use, preventing heat damage to the handle and control circuit, extending the service life of the hot melt machine, and improving the comfort of using the hot melt machine. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is an exploded view of the present invention;

[0024] Figure 3 This is a partial sectional view of the present invention;

[0025] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0026] Figure 5 This is a schematic diagram of the right shell structure in this utility model;

[0027] Figure 6 This is a schematic diagram of the heating block in this utility model;

[0028] Figure 7 This is one of the structural schematic diagrams of the heat insulation seat in this utility model;

[0029] Figure 8 This is the second schematic diagram of the structure of the heat insulation seat in this utility model;

[0030] Figure 9 This is a schematic diagram of the connecting seat in this utility model;

[0031] Figure 10 This is a cross-sectional view of the connecting seat in this utility model;

[0032] Figure 11 This is a schematic diagram of the structure of the baffle in this utility model;

[0033] Figure 12 This is a schematic diagram of the temperature measuring device in this utility model.

[0034] The labels in the diagram have the following meanings: 1-Handle; 11-Left shell; 12-Right shell; 13-Control circuit; 121-C-type slot; 2-Heating block; 21-Heating wire; 22-Supporting protrusion; 3-Heat insulation device; 31-Heat insulation plate; 32-Heat insulation seat; 33-Connecting seat; 34-Baffle; 311-Through groove; 321-Mounting cavity; 322-Slot; 323-Ventilation hole; 324-Positioning groove; 331-Snap-fit ​​protrusion; 332-Positioning protrusion; 341-Shielding part; 342-Ventilation groove; 4-Temperature measuring device; 41-Firming wall; 42-Detection part; 5-First heat insulation gap; 51-Second heat insulation gap. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0036] See Figures 1 to 12 As shown, a hot melt machine includes a handle 1 and a heating block 2. A heat insulation device 3 is provided between the handle 1 and the heating block 2. The heat insulation device 3 is detachably connected to both the handle 1 and the heating block 2. A control circuit 13 for controlling the heating block 2 is provided on the handle 1. A first heat insulation gap 5 is provided between the heating block 2 and the heat insulation device 3. The heat insulation device 3 includes a heat insulation sheet, which is located on the side of the first heat insulation gap 5 away from the heating block 2. A temperature measuring device 4 is provided on the side of the heat insulation sheet away from the heating block 2. The temperature measuring device 4 can measure the temperature of the side of the heat insulation sheet away from the heating block 2. The temperature measuring device 4 is electrically connected to the control circuit 13. In this structure, since the heat insulation sheet is located on the side of the first heat insulation gap 5 away from the heating block 2, and the temperature measuring device 4 detects the temperature of the side of the heat insulation sheet away from the heating block 2, this temperature will be much lower than the actual temperature of the heating block 2, avoiding overheating and damage to the temperature measuring device 4. Manufacturers can use a detection device with a lower maximum measurement temperature, thereby reducing the production cost of the hot melt machine.

[0037] When the temperature measuring device 4 detects that the temperature of the side of the heat insulation sheet away from the heating block 2 exceeds the set value, the control circuit 13 controls the heating plate to stop heating, thereby preventing the heating block 2 from overheating.

[0038] In this utility model, since the heat insulation effect of the heat insulation board 31 made of different materials is different, the control circuit 13 can be edited according to the relationship between the heating block 2 and the temperature detected by the temperature measuring device 4 during the use process, based on experimental calculations before mass production of the heat melter.

[0039] The heating block 2 is provided with a heating wire 21, which is electrically connected to the control circuit through a wire. The heat insulation plate 31 is provided with a through groove 311, through which the wire passes and is electrically connected to the control circuit.

[0040] Preferably, the temperature measuring device 4 is connected in series with the control circuit 13. If the temperature measuring device 4 is damaged due to overheating, the control circuit 13 will be disconnected, thereby stopping the heating plate from heating. This structure can prevent the heating block 2 from being damaged due to overheating, which could lead to overheating damage to other parts of the hot melt. In this case, the user can replace the temperature measuring device 4 and continue to use it, which helps to reduce the maintenance cost of the hot melt and facilitates the continued use of the hot melt.

[0041] In this embodiment, the temperature measuring device 4 is provided with a detection part 42 near the heat insulation plate 31. The outer periphery of the detection part 42 is provided with a pressing wall 41, which presses against the heat insulation plate 31. This structure can reduce the influence of the external environment on the detection result of the temperature measuring device 4, and is conducive to reducing the detection error of the temperature measuring device 4. Preferably, the control circuit 13 is provided with a display screen for displaying the temperature.

[0042] The heating block 2 includes a heating block 2 body, which extends toward the heat insulation sheet to form a plurality of support protrusions 22. Fasteners connect the heating block 2 to the heat insulation sheet and press the support protrusions 22 against the heat insulation sheet, thereby forming the first heat insulation gap 5 between the heating block 2 body and the heat insulation sheet. The setting of the support protrusions 22 facilitates the limitation of the width of the first heat insulation gap 5, avoids errors in the width of the first heat insulation gap 5 during the assembly and production process from affecting the detection results of the temperature measuring device 4, and is beneficial to the control circuit 13 in controlling the maximum heating temperature of the heating block 2.

[0043] The heat insulation device 3 described in this utility model includes a heat insulation seat 32, which is located on the side of the heat insulation sheet away from the heating block 2. The heat insulation seat 32 has an installation cavity 321, and the temperature measuring device 4 is installed in the installation cavity 321. The heat insulation seat 32 can reduce the temperature of the handle 1 during use, prevent damage to the control circuit 13, and facilitate user use. The installation cavity 321 can prevent other objects from contacting the temperature measuring device 4 during use, prevent the temperature measuring device 4 from becoming loose or damaged, reduce the error of the detection result of the temperature measuring device 4, and extend the service life of the heat melter.

[0044] The heat insulation seat 32 has a vent hole 323 on its side wall and a baffle plate on its side. The baffle plate is located on one side of the vent hole 323 and can block the vent hole 323, so that the vent hole 323 and the baffle plate combine to form a curved airflow channel. The vent hole 323 can reduce the temperature in the mounting cavity 321 and prevent the air in the mounting cavity 321 from overheating and causing damage to the handle 1 or the control circuit 13. The baffle plate can prevent foreign objects from entering the mounting cavity 321 and prevent foreign objects from damaging the temperature measuring device 4 or the control circuit 13, or from burning in the mounting cavity 321, which helps to extend the service life of the hot melt.

[0045] The heat insulation base 32 of this invention is provided with a slot 322, and a baffle is slidably disposed in the slot 322. The heat insulation plate 31 abuts against the baffle and fixes the baffle to the heat insulation base 32. The heat insulation base 32 is provided with a plurality of vent holes 323 at intervals. The baffle 34 is provided with blocking parts 341 corresponding to the vent holes 323 at intervals. Ventilation grooves 342 are formed between the blocking parts 341. The slot 322 facilitates the positioning and installation of the baffle, and the corresponding ventilation grooves 341 are provided with the blocking parts 341 corresponding to the vent holes 323. The shielding part 341 prevents debris from directly entering the mounting cavity 321. The ventilation groove 342 facilitates the air circulation in the mounting cavity 321. In this embodiment, the mounting cavity 321 is provided with oppositely arranged slots 322 on both sides. The baffle 34 is respectively inserted into the two oppositely arranged slots 322 on both sides. One end of the slot 322 extends to the end of the heat insulation seat 32 near the heat insulation plate 31. The other end of the slot 322 is provided with a side wall. The heat insulation plate 31 drives the baffle 34 to press against the side wall.

[0046] The heat insulation device 3 also includes a connecting seat 33 detachably connected to the handle 1. The handle 1 includes a left shell 11 and a right shell 12 detachably connected. The connecting seat 33 has a snap-fit ​​protrusion 331 on its side. Both the left shell 11 and the right shell 12 have C-shaped slots 121. Fasteners fix the left shell 11 and the right shell 12 relative to each other, so that the snap-fit ​​protrusion 331 and the C-shaped slot 121 are in contact. The connecting seat 33 facilitates the stable connection between the heat insulation device 3 and the handle 1. During use, different parts of the heat insulation device 3 can be made of different materials, so that the heat insulation device 3 can not only achieve a good heat insulation effect, but also facilitate the production equipment and help extend the service life of the hot melt. The snap-fit ​​protrusion 331 and the C-shaped slot 121 facilitate the stable connection between the heat insulation device 3 and the handle 1, and prevent the heat insulation device 3 from accidentally detaching from the handle 1 during use, which could lead to accidents.

[0047] In this embodiment, the connecting seat 33 is provided with a plurality of positioning protrusions 332, and the heat insulation seat 32 is provided with positioning grooves 324 adapted to the positioning protrusions 332. The positioning protrusions 332 and the positioning grooves 324 cooperate to position and install the connecting seat 33 and the heat insulation seat 32, and form a second heat insulation gap 51 between the connecting seat 33 and the heat insulation seat 32. The positioning protrusions 332 and the positioning grooves 324 facilitate the quick positioning and installation of the connecting seat 33 and the heat insulation seat 32, while the second heat insulation gap 51 helps to reduce the temperature of the connecting seat 33 and the handle 1 during use, avoid heat insulation damage to the handle 1 and the control circuit 13, extend the service life of the hot melt machine, and improve the comfort of using the hot melt machine.

[0048] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A heat melter, comprising a handle (1) and a heating block (2), wherein a heat insulation device (3) is provided between the handle (1) and the heating block (2), the heat insulation device (3) being detachably connected to the handle (1) and the heating block (2) respectively, and a control circuit (13) for controlling the heating block (2) is provided on the handle (1), characterized in that: The heating block (2) is provided with a first heat insulation gap (5) with a heat insulation device (3), the heat insulation device (3) comprises a heat insulation sheet arranged on the side of the first heat insulation gap (5) away from the heating block (2), and a temperature measuring device (4) is arranged on the side of the heat insulation sheet away from the heating block (2), the temperature measuring device (4) can measure the temperature on the side of the heat insulation sheet away from the heating block (2), and the temperature measuring device (4) is electrically connected with a control circuit (13); When the temperature measuring device (4) detects that the temperature on the side of the heat insulation sheet away from the heating block (2) exceeds the set value, the control circuit (13) controls the heating plate to stop heating.

2. A heat staking tool as defined in claim 1, wherein: The temperature measuring device (4) and the control circuit (13) are connected in series, and the overheating damage of the temperature measuring device (4) can cause the control circuit (13) to be disconnected, so that the heating plate stops heating.

3. A heat staking tool as defined in claim 1, wherein: The heating block (2) comprises a heating block (2) main body, a plurality of supporting protrusions (22) are formed on the heating block (2) main body extending to the heat insulation sheet, and a fastener connects the heating block (2) and the heat insulation sheet and makes the supporting protrusions (22) abut against the heat insulation sheet, so that the first heat insulation gap (5) is formed between the heating block (2) main body and the heat insulation sheet.

4. A heat staking tool as defined in claim 1, wherein: The heat insulation device (3) comprises a heat insulation seat (32), the heat insulation seat (32) is arranged on the side of the heat insulation sheet away from the heating block (2), and the heat insulation seat (32) is provided with a mounting cavity (321), and the temperature measuring device (4) is arranged in the mounting cavity (321).

5. A heat staking tool as defined in claim 4, wherein: The side wall of the heat insulation seat (32) is provided with a breathable hole (323), the heat insulation seat (32) is provided with a baffle, the baffle is arranged on one side of the breathable hole (323) and can shield the breathable hole (323), so that the breathable hole (323) and the baffle form a curved air flow channel.

6. A heat staking tool as defined in claim 5, wherein: The heat insulation seat (32) is provided with a slot (322), the baffle is slidably arranged in the slot (322), the heat insulation plate (31) abuts against the baffle and fixes the baffle on the heat insulation seat (32), a plurality of breathable holes (323) are arranged on the heat insulation seat (32) at intervals, and a baffle (34) is arranged on the heat insulation plate (31) and is provided with a shielding part (341) corresponding to the breathable hole (323), and the shielding parts (341) form a breathable groove (342) therebetween.

7. A heat staking tool as defined in claim 4, wherein: The heat insulation device (3) further comprises a connecting seat (33) detachably connected with the handle (1), the handle (1) comprises a left shell (11) and a right shell (12) detachably connected, the connecting seat (33) is provided with a clamping protrusion (331) on the side surface, the left shell (11) and the right shell (12) are provided with C-shaped clamping grooves (121), and a fastener is used to fix the left shell (11) and the right shell (12) relative to each other, so that the clamping protrusion (331) and the C-shaped clamping groove (121) are kept in cooperation.

8. A heat staking tool as defined in claim 7, wherein: The connecting seat (33) is provided with a plurality of positioning protrusions (332), and the heat insulation seat (32) is provided with positioning grooves (324) matched with the positioning protrusions (332), the positioning protrusions (332) and the positioning grooves (324) are matched to position and install the connecting seat (33) and the heat insulation seat (32), and the connecting seat (33) and the heat insulation seat (32) form a second heat insulation gap (51) therebetween.

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